Compound engine.



Patented luly 3|, I900.

w. T. HARRIS, COMPOUND ENGINE. (Application filed Apr. 17, 1899.)

3 Sheets-Sheet I,

(No Model.)

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WITNESSES 621a W THE mums rmns 0a.. PNOYO-LITNQ. WA$HINOYDN a c No.654,975. Patented July 3|, I900.

w. T. HARRIS.

COMPOUND ENGINE.

(Application filed Apr. 1 7, '1899.)

(No Modei.) 3 Sheets-Shaet 3.

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WILLIAM T. HARRIS, OF LOUISVILLE, KENTUCKY.

' COMPOUND ENGINE.

SEECIFICATION forming partof Letters Patent No. 654,975, dated July 31,1900.

' Application filed April 17, 1899. Serial No. 713,311. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM T. HARRIS,a citizen of the United States,residing at Louisville, in the county of Jefferson and State ofKentucky, have invented certainnew and useful Improvements in CompoundEngines, of

which the following is a specification.

The object of my present invention is to provide in double -cylindersteam engines in which one of the cylinders is arranged to be workedunder expansion by the exhaust-steam from the other an arrangementwhereby the two cylinders may be positioned parallel with and alongsideeach other, in combination with means by which the force of both may betransmitted to the crank of the machine to be driven.

I have designed this invention especially for use with locomotives, towhich it is peculiarly adapted,'and I will-illustrate and describe theapparatusas so used, although obviously it is applicable tosteam-engines of other varieties.

Referring to the accompanying drawings, which are made a part hereof,and on which similar reference characters indicate similar parts, Figure1 is a view of the driving-wheels, steam-cylinders, pitmen, andconnecting-rods of a locomotive, the boiler thereof being also shown inoutline, the steam-cylinders and valve-chests being shown in section;Fig. 2, a plan view thereof, omitting the boiler and such other parts asdo not especially relate to my invention; Fig. 3, atransverse sectionalview on the dotted line 3 3 in Fig. 1; Fig. 4, a transverse sectionalview as seen from the dotted line 4i 4 in Fig. 1; and Fig. 5, a viewsimilar to Fig. 1, but showing the arrangement when a cylindrical valveis used instead of the ordinary slide-valve.

The locomotive shown is of the ten-wheel variety. I will omit allreference to the boiler, trucks, and such like parts which have noimmediate connection with my present invention. I will also confine mydescription to the mechanism on one side, as that upon the other sideis, as usual, substantially aduplication.

The driving-wheels 1, 2, and 3 are connected by connecting-rods at and5, which are suitably mounted upon their wrists, and from the wrist ofthe wheel 2 the'pitman 6 extends back to a cross-head 7, which in turnis connected to the piston-rod 8, carrying a piston-head 9,- whichtravels back and forth in the steamcylinder 10 as it is impelled by thesteam, all in the ordinary and well-known manner. ranged above thesteam-cylinder 10 is a second and larger cylinder 11, in which travels apiston-head 12, secured in the usual manner to a piston-rod 13, which isconnected to a cross- 20 of the steam-cylinder 11 and thence into 7 saidcylinder 11, where it operates under expansion upon the piston-head 12therein. As will be understood, the shaft 15 extends through to theother side of the engine and has a similar mechanism rigidly fixed toits other end. By this arrangement the power of three cylinders is atall times exerted upon the driving-gear.

- .In the principal views, as above stated, I have shown the ordinarysteam-chests and an ordinary variety of slide-valves therein. Theseslide-valves 21 and 22 are operated by the valve-rods 23 and 24, whichare connected at their outer ends by-a rocker-arm 25, and this isimpelled, as usual, by a suitable connection with an appropriate movingpart. This, however, as it is or may be of asubstantiallyordinaryandwell-known form,need not be further describedherein.

In Fig. 5 I have shown, instead of the ordinary slide-valves each havingits own steamchest, a cylindrical steam chest in which a piston-valvehaving six heads operates, and the valve connections are modifiedaccordin gly. This piston-valve construction is more compact than theother and is in some respects to be preferred; but the variety ofsteam-chest and valve is not material to my invention so long as somevarietyis employed by means of which the steam maybeconducted first intothe smaller steam-cylinder and after it has done its work therein thenceto the larger, Where it may do further Work, my invention consistingwholly of the peculiar arrangement described, by means of which, withoutundue prolongation of the structure, the advantage of a double-cylinderengine Working under expansion may be Y secured in the class ofsteam-engines to which this arrangement of apparatus is applicable.

Having thus fully described my said invention, what Iclainl as new, anddesire to secure by Letters Patent, is The combination, in a locomotive,of the driving-wheels, the connecting-rods connected to the wriststhereof, a connecting-rod running from one of said wrists to a crosshead, suitable ways for said cross-head, a piston connected to saidcross head, a steamcylinder in which said piston operates, a suitablevalve whereby steam is admitted to and permitted to escape from saidcylinder, a sec ond steam-cylinder to which the steam as it escapes fromthe first steam-cylinder is conducted, a piston in said second cylinder,a

cross-head to which said piston is connected,-

suitable Ways for said cross-head, a ,rock- I shaftextending throughfrom one side to the other of the engine, a disk or rock-arm on each endof said rock-shaft, and connecting-rods running from wrists on each ofsaid disks or rock arms to the crossheads connected with the duplicatecylinders on each side of the engine, whereby the force from .the twosets of steam-cylinders is transmitted to and exerted upon saiddriving-wheels, substantially as shown and described.

In witness whereof I have hereunto set my hand and. seal, atIndianapolis, Indiana, this- 12th day of April, A. D. 1899.

WILLIAM T. HARRIS. [L, s.]

Witnesses: CHESTER BRADFORD, JAMES A. WALSH.

